1 /* $Id: entry.S,v 1.16 2003/07/04 08:27:41 starvik Exp $
3 * linux/arch/cris/entry.S
5 * Copyright (C) 2000, 2001, 2002 Axis Communications AB
7 * Authors: Bjorn Wesen (bjornw@axis.com)
10 * Revision 1.16 2003/07/04 08:27:41 starvik
11 * Merge of Linux 2.5.74
13 * Revision 1.15 2003/04/09 07:32:55 starvik
14 * resume should return task_struct, not thread_info
16 * Revision 1.14 2003/04/09 05:20:44 starvik
17 * Merge of Linux 2.5.67
19 * Revision 1.13 2002/12/11 15:42:02 starvik
20 * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/*.c
22 * Revision 1.12 2002/12/10 09:00:10 starvik
23 * Merge of Linux 2.5.51
25 * Revision 1.11 2002/12/05 07:53:10 starvik
26 * Corrected constants used with btstq
28 * Revision 1.10 2002/11/27 08:45:10 starvik
29 * pid is in task_struct, not thread_info
31 * Revision 1.9 2002/11/26 09:52:05 starvik
32 * Added preemptive kernel scheduling (if CONFIG_PREEMPT)
34 * Revision 1.8 2002/11/20 11:56:11 starvik
35 * Merge of Linux 2.5.48
37 * Revision 1.7 2002/11/18 13:02:42 starvik
38 * Added fourth parameter to do_notify_resume
41 * Revision 1.6 2002/11/11 10:37:50 starvik
42 * Use new asm-offset defines
43 * Modified for new location of current->work etc
44 * Removed SYMBOL_NAME from syscalls
45 * Added some new syscalls
47 * Revision 1.5 2002/11/05 06:45:11 starvik
48 * Merge of Linux 2.5.45
50 * Revision 1.4 2002/02/05 15:41:31 bjornw
51 * Rewritten to conform better to current 2.5 code (similar to arch/i386)
53 * Revision 1.3 2002/01/21 15:22:20 bjornw
54 * NICE_DOGGY fix from 2.4 arch/cris
56 * Revision 1.37 2001/12/07 17:03:55 bjornw
57 * Call a c-hook called watchdog_bite_hook instead of show_registers directly
59 * Revision 1.36 2001/11/22 13:36:36 bjornw
60 * * In ret_from_intr, check regs->dccr for usermode reentrance instead of
61 * DCCR explicitely (because the latter might not reflect current reality)
62 * * In mmu_bus_fault, set $r9 _after_ calling the C-code instead of before
63 * since $r9 is call-clobbered and is potentially needed afterwards
65 * Revision 1.35 2001/10/30 17:10:15 bjornw
68 * Revision 1.34 2001/10/01 14:45:03 bjornw
69 * Removed underscores and added register prefixes
71 * Revision 1.33 2001/08/21 13:48:01 jonashg
72 * Added fix by HP to avoid oops when doing a hard_reset_now.
74 * Revision 1.32 2001/08/14 04:32:02 hp
75 * In _resume, add comment why R9 is saved; don't sound like it's call-saved.
77 * Revision 1.31 2001/07/25 16:07:42 bjornw
78 * softirq_active/mask -> softirq_pending only
80 * Revision 1.30 2001/07/05 01:03:32 hp
81 * - include asm/errno.h to get ENOSYS.
82 * - Use ENOSYS, not local constant LENOSYS; tweak comments.
83 * - Explain why .include, not #include is used.
84 * - Make oops-register-dump if watchdog bits and it's not expected.
85 * - Don't jsr, use jump _hard_reset_now, and skip spurious nop.
86 * - Use correct section attribute for section .rodata.
87 * - Adjust sys_ni_syscall fill number.
89 * Revision 1.29 2001/06/25 14:07:00 hp
91 * * head.S: Use IO_STATE, IO_FIELD and IO_MASK constructs instead of
92 * magic numbers. Add comment that -traditional must not be used.
93 * * entry.S (SYMBOL_NAME): Change redefinition to use ## concatenation.
94 * Correct and update comment.
95 * * Makefile (.S.o): Don't use -traditional. Add comment why the
96 * toplevel rule can't be used (now that there's a reason).
98 * Revision 1.28 2001/06/21 02:00:40 hp
99 * * entry.S: Include asm/unistd.h.
100 * (_sys_call_table): Use section .rodata, not .data.
101 * (_kernel_thread): Move from...
102 * * process.c: ... here.
103 * * entryoffsets.c (VAL): Break out from...
105 * (LCLONE_VM): New asmified value from CLONE_VM.
107 * Revision 1.27 2001/05/29 11:25:27 markusl
108 * In case of "spurious_interrupt", do hard_reset instead of hanging system in a loop...
110 * Revision 1.26 2001/05/15 15:46:03 bjornw
111 * Include config.h now that we use some CONFIG_ options
113 * Revision 1.25 2001/05/15 05:38:47 hp
114 * Tweaked code in _ret_from_sys_call
116 * Revision 1.24 2001/05/15 05:27:49 hp
117 * Save r9 in r1 over function call rather than on stack.
119 * Revision 1.23 2001/05/15 05:10:00 hp
120 * Generate entry.S structure offsets from C
122 * Revision 1.22 2001/04/17 13:58:39 orjanf
123 * * Renamed CONFIG_KGDB to CONFIG_ETRAX_KGDB.
125 * Revision 1.21 2001/04/17 11:33:29 orjanf
126 * Updated according to review:
127 * * Included asm/sv_addr_ag.h to get macro for internal register.
128 * * Corrected comment regarding system call argument passing.
129 * * Removed comment about instruction being in a delay slot.
130 * * Added comment about SYMBOL_NAME macro.
132 * Revision 1.20 2001/04/12 08:51:07 hp
133 * - Add entry for sys_fcntl64. In fact copy last piece from i386 including ...
134 * - .rept to fill table to safe state with sys_ni_syscall.
136 * Revision 1.19 2001/04/04 09:43:32 orjanf
137 * * Moved do_sigtrap from traps.c to entry.S.
138 * * LTASK_PID need not be global anymore.
140 * Revision 1.18 2001/03/26 09:25:02 markusl
141 * Updated after review, should now handle USB interrupts correctly.
143 * Revision 1.17 2001/03/21 16:12:55 bjornw
144 * * Always make room for the cpu status record in the frame, in order to
145 * use the same framelength and layout for both mmu busfaults and normal
146 * irqs. No need to check for the explicit CRIS_FRAME_FIXUP type anymore.
147 * * Fixed bug with using addq for popping the stack in the epilogue - it
148 * destroyed the flag register. Use instructions that don't affect the
149 * flag register instead.
150 * * Removed write to R_PORT_PA_DATA during spurious_interrupt
152 * Revision 1.16 2001/03/20 19:43:02 bjornw
153 * * Get rid of esp0 setting
154 * * Give a 7th argument to a systemcall - the stackframe
156 * Revision 1.15 2001/03/05 13:14:30 bjornw
159 * Revision 1.14 2001/02/23 08:36:36 perf
160 * New ABI; syscallnr=r9, arg5=mof, arg6=srp.
161 * Corrected tracesys call check.
163 * Revision 1.13 2001/02/15 08:40:55 perf
164 * H-P by way of perf;
165 * - (_system_call): Don't read system call function address into r1.
166 * - (RBFExit): There is no such thing as a null pop. Adjust sp by addq.
167 * - (_system_call): Don't use r10 and don't save and restore it.
168 * - (THREAD_ESP0): New constant.
169 * - (_system_call): Inline set_esp0.
171 * Revision 1.12 2001/01/31 17:56:25 orjanf
172 * Added definition of LTASK_PID and made it global.
174 * Revision 1.11 2001/01/10 21:13:29 bjornw
175 * SYMBOL_NAME is defined incorrectly for the compiler options we currently use
177 * Revision 1.10 2000/12/18 23:47:56 bjornw
178 * * Added syscall trace support (ptrace), completely untested of course
179 * * Removed redundant check for NULL entries in syscall_table
181 * Revision 1.9 2000/11/21 16:40:51 bjornw
182 * * New frame type used when an SBFS frame needs to be popped without
183 * actually restarting the instruction
184 * * Enable interrupts in signal_return (they did so in x86, I hope it's a good
187 * Revision 1.8 2000/11/17 16:53:35 bjornw
188 * Added detection of frame-type in Rexit, so that mmu_bus_fault can
189 * use ret_from_intr in the return-path to check for signals (like SEGV)
190 * and other foul things that might have occurred during the fault.
192 * Revision 1.7 2000/10/06 15:04:28 bjornw
193 * Include mof in register savings
195 * Revision 1.6 2000/09/12 16:02:44 bjornw
196 * Linux-2.4.0-test7 derived updates
198 * Revision 1.5 2000/08/17 15:35:15 bjornw
199 * 2.4.0-test6 changed local_irq_count and friends API
201 * Revision 1.4 2000/08/02 13:59:30 bjornw
202 * Removed olduname and uname from the syscall list
204 * Revision 1.3 2000/07/31 13:32:58 bjornw
205 * * Export ret_from_intr
206 * * _resume updated (prev/last tjohejsan)
207 * * timer_interrupt obsolete
208 * * SIGSEGV detection in mmu_bus_fault temporarily disabled
214 * entry.S contains the system-call and fault low-level handling routines.
216 * NOTE: This code handles signal-recognition, which happens every time
217 * after a timer-interrupt and after each system call.
219 * Stack layout in 'ret_from_system_call':
220 * ptrace needs to have all regs on the stack.
221 * if the order here is changed, it needs to be
222 * updated in fork.c:copy_process, signal.c:do_signal,
223 * ptrace.c and ptrace.h
227 #include <linux/config.h>
228 #include <linux/linkage.h>
229 #include <linux/sys.h>
230 #include <asm/unistd.h>
231 #include <asm/arch/sv_addr_ag.h>
232 #include <asm/errno.h>
233 #include <asm/thread_info.h>
234 #include <asm/arch/offset.h>
236 ;; functions exported from this file
242 .globl multiple_interrupt
244 .globl IRQ1_interrupt
245 .globl spurious_interrupt
249 .globl gdb_handle_breakpoint
250 .globl sys_call_table
252 ;; below are various parts of system_call which are not in the fast-path
254 #ifdef CONFIG_PREEMPT
255 ; Check if preemptive kernel scheduling should be done
257 ; Load current task struct
258 movs.w -8192, $r0 ; THREAD_SIZE = 8192
260 move.d [$r0+TI_preempt_count], $r10 ; Preemption disabled?
264 move.d [$r0+TI_flags], $r10
265 btstq TIF_NEED_RESCHED, $r10 ; Check if need_resched is set
268 ; Ok, lets's do some preemptive kernel scheduling
269 move.d PREEMPT_ACTIVE, $r10
270 move.d $r10, [$r0+TI_preempt_count] ; Mark as active
273 clear.d [$r0+TI_preempt_count] ; Mark as inactive
275 ; Load new task struct
276 movs.w -8192, $r0 ; THREAD_SIZE = 8192
278 ; One more time (with new task)
282 #define _resume_kernel _Rexit
285 ; Called at exit from fork. schedule_tail must be called to drop
286 ; spinlock if CONFIG_PREEMPT
293 ;; check for resched if preemptive kernel or if we're going back to user-mode
294 ;; this test matches the user_regs(regs) macro
295 ;; we cannot simply test $dccr, because that does not necessarily
296 ;; reflect what mode we'll return into.
298 move.d [$sp + PT_dccr], $r0; regs->dccr
299 btstq 8, $r0 ; U-flag
301 ; Note that di below is in delay slot
304 di ; so need_resched and sigpending don't change
306 movs.w -8192, $r0 ; THREAD_SIZE == 8192
309 move.d [$r0+TI_flags], $r10 ; current->work
310 and.d _TIF_WORK_MASK, $r10 ; is there any work to be done on return
316 ;; The system_call is called by a BREAK instruction, which works like
317 ;; an interrupt call but it stores the return PC in BRP instead of IRP.
318 ;; Since we dont really want to have two epilogues (one for system calls
319 ;; and one for interrupts) we push the contents of BRP instead of IRP in the
320 ;; system call prologue, to make it look like an ordinary interrupt on the
323 ;; Since we can't have system calls inside interrupts, it should not matter
324 ;; that we don't stack IRP.
326 ;; In r9 we have the wanted syscall number. Arguments come in r10,r11,r12,r13,mof,srp
328 ;; This function looks on the _surface_ like spaghetti programming, but it's
329 ;; really designed so that the fast-path does not force cache-loading of non-used
330 ;; instructions. Only the non-common cases cause the outlined code to run..
333 ;; stack-frame similar to the irq heads, which is reversed in ret_from_sys_call
334 move $brp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
338 subq 14*4, $sp ; make room for r0-r13
339 movem $r13, [$sp] ; push r0-r13
340 push $r10 ; push orig_r10
341 clear.d [$sp=$sp-4] ; frametype == 0, normal stackframe
344 move.d $r0, [$sp+PT_r10] ; put the default return value in r10 in the frame
346 ;; check if this process is syscall-traced
348 movs.w -8192, $r0 ; THREAD_SIZE == 8192
351 move.d [$r0+TI_flags], $r0
352 btstq TIF_SYSCALL_TRACE, $r0
353 bmi _syscall_trace_entry
358 ;; check for sanity in the requested syscall number
360 cmpu.w NR_syscalls, $r9
361 bcc ret_from_sys_call
362 lslq 2, $r9 ; multiply by 4, in the delay slot
364 ;; as a bonus 7th parameter, we give the location on the stack
365 ;; of the register structure itself. some syscalls need this.
369 ;; the parameter carrying registers r10, r11, r12 and 13 are intact.
370 ;; the fifth and sixth parameters (if any) was in mof and srp
371 ;; respectively, and we need to put them on the stack.
376 jsr [$r9+sys_call_table] ; actually do the system call
377 addq 3*4, $sp ; pop the mof, srp and regs parameters
378 move.d $r10, [$sp+PT_r10] ; save the return value
380 moveq 1, $r9 ; "parameter" to ret_from_sys_call to show it was a sys call
382 ;; fall through into ret_from_sys_call to return
385 ;; r9 is a parameter - if >=1 we came from a syscall, if 0, from an irq
387 ;; get the current task-struct pointer (see top for defs)
389 movs.w -8192, $r0 ; THREAD_SIZE == 8192
392 di ; make sure need_resched and sigpending don't change
393 move.d [$r0+TI_flags],$r1
394 and.d _TIF_ALLWORK_MASK, $r1
395 bne _syscall_exit_work
399 ;; this epilogue MUST match the prologues in multiple_interrupt, irq.h and ptregs.h
401 bne _RBFexit ; was not CRIS_FRAME_NORMAL, handle otherwise
402 addq 4, $sp ; skip orig_r10, in delayslot
403 movem [$sp+], $r13 ; registers r0-r13
404 pop $mof ; multiply overflow register
405 pop $dccr ; condition codes
406 pop $srp ; subroutine return pointer
407 ;; now we have a 4-word SBFS frame which we do not want to restore
408 ;; using RBF since it was not stacked with SBFS. instead we would like to
409 ;; just get the PC value to restart it with, and skip the rest of
411 ;; Also notice that it's important to use instructions here that
412 ;; keep the interrupts disabled (since we've already popped DCCR)
413 move [$sp=$sp+16], $p8; pop the SBFS frame from the sp
414 jmpu [$sp-16] ; return through the irp field in the sbfs frame
417 movem [$sp+], $r13 ; registers r0-r13, in delay slot
418 pop $mof ; multiply overflow register
419 pop $dccr ; condition codes
420 pop $srp ; subroutine return pointer
421 rbf [$sp+] ; return by popping the CPU status
423 ;; We get here after doing a syscall if extra work might need to be done
424 ;; perform syscall exit tracing if needed
427 ;; $r0 contains current at this point and irq's are disabled
429 move.d [$r0+TI_flags], $r1
430 btstq TIF_SYSCALL_TRACE, $r1
436 move.d $r9, $r1 ; preserve r9
444 move.d [$r0+TI_flags], $r1
445 btstq TIF_NEED_RESCHED, $r1
446 bpl _work_notifysig ; was neither trace nor sched, must be signal/notify
450 move.d $r9, $r1 ; preserve r9
455 move.d [$r0+TI_flags], $r1
456 and.d _TIF_WORK_MASK, $r1; ignore the syscall trace counter
459 btstq TIF_NEED_RESCHED, $r1
460 bmi _work_resched ; current->work.need_resched
464 ;; deal with pending signals and notify-resume requests
466 move.d $r9, $r10 ; do_notify_resume syscall/irq param
467 moveq 0, $r11 ; oldset param - 0 in this case
468 move.d $sp, $r12 ; the regs param
469 move.d $r1, $r13 ; the thread_info_flags parameter
475 ;; We get here as a sidetrack when we've entered a syscall with the
476 ;; trace-bit set. We need to call do_syscall_trace and then continue
479 _syscall_trace_entry:
480 ;; PT_r10 in the frame contains -ENOSYS as required, at this point
484 ;; now re-enter the syscall code to do the syscall itself
485 ;; we need to restore $r9 here to contain the wanted syscall, and
486 ;; the other parameter-bearing registers
488 move.d [$sp+PT_r9], $r9
489 move.d [$sp+PT_orig_r10], $r10 ; PT_r10 is already filled with -ENOSYS.
490 move.d [$sp+PT_r11], $r11
491 move.d [$sp+PT_r12], $r12
492 move.d [$sp+PT_r13], $r13
493 move [$sp+PT_mof], $mof
494 move [$sp+PT_srp], $srp
499 ;; resume performs the actual task-switching, by switching stack pointers
500 ;; input arguments: r10 = prev, r11 = next, r12 = thread offset in task struct
501 ;; returns old current in r10
503 ;; TODO: see the i386 version. The switch_to which calls resume in our version
504 ;; could really be an inline asm of this.
507 push $srp ; we keep the old/new PC on the stack
508 add.d $r12, $r10 ; r10 = current tasks tss
509 move $dccr, [$r10+THREAD_dccr]; save irq enable state
512 move $usp, [$r10+ THREAD_usp] ; save user-mode stackpointer
514 ;; See copy_thread for the reason why register R9 is saved.
516 movem $r9, [$sp] ; save non-scratch registers and R9.
518 move.d $sp, [$r10+THREAD_ksp] ; save the kernel stack pointer for the old task
519 move.d $sp, $r10 ; return last running task in r10
520 and.d -8192, $r10 ; get thread_info from stackpointer
521 move.d [$r10+TI_task], $r10 ; get task
522 add.d $r12, $r11 ; find the new tasks tss
523 move.d [$r11+THREAD_ksp], $sp ; switch into the new stackframe by restoring kernel sp
525 movem [$sp+], $r9 ; restore non-scratch registers and R9.
527 move [$r11+THREAD_usp], $usp ; restore user-mode stackpointer
529 move [$r11+THREAD_dccr], $dccr ; restore irq enable status
530 jump [$sp+] ; restore PC
532 ;; This is the MMU bus fault handler.
533 ;; It needs to stack the CPU status and overall is different
534 ;; from the other interrupt handlers.
537 sbfs [$sp=$sp-16] ; push the internal CPU status
538 ;; the first longword in the sbfs frame was the interrupted PC
539 ;; which fits nicely with the "IRP" slot in pt_regs normally used to
540 ;; contain the return address. used by Oops to print kernel errors..
541 push $srp ; make a stackframe similar to pt_regs
547 push $r10 ; dummy orig_r10
549 push $r10 ; frametype == 1, BUSFAULT frame type
551 move.d $sp, $r10 ; pt_regs argument to handle_mmu_bus_fault
553 jsr handle_mmu_bus_fault ; in arch/cris/mm/fault.c
555 ;; now we need to return through the normal path, we cannot just
556 ;; do the RBFexit since we might have killed off the running
557 ;; process due to a SEGV, scheduled due to a page blocking or
560 moveq 0, $r9 ; busfault is equivalent to an irq
565 ;; special handlers for breakpoint and NMI
576 move.d [hw_bp_msg],$r10
593 move.d [hw_bp_trig_ptr],$r10
600 move.d $r10,[hw_bp_trig_ptr]
611 #if defined(CONFIG_ETRAX_WATCHDOG) && !defined(CONFIG_SVINTO_SIM)
612 ;; If we receive a watchdog interrupt while it is not expected, then set
613 ;; up a canonical frame and dump register contents before dying.
615 ;; this prologue MUST match the one in irq.h and the struct in ptregs.h!!!
616 move $brp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
623 push $r10 ; push orig_r10
624 clear.d [$sp=$sp-4] ; frametype == 0, normal frame
626 ;; We don't check that we actually were bit by the watchdog as opposed to
627 ;; an external NMI, since there is currently no handler for external NMI.
629 ;; Check if we're waiting for reset to happen, as signalled by
630 ;; hard_reset_now setting cause_of_death to a magic value. If so, just
631 ;; get stuck until reset happens.
632 .comm cause_of_death, 4 ;; Don't declare this anywhere.
633 move.d [cause_of_death], $r10
639 ;; We'll see this in ksymoops dumps.
642 #ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
643 ;; We just restart the watchdog here to be sure we dont get
644 ;; hit while printing the watchdogmsg below
645 ;; This restart is compatible with the rest of the C-code, so
646 ;; the C-code can keep restarting the watchdog after this point.
647 ;; The non-NICE_DOGGY code below though, disables the possibility
648 ;; to restart since it changes the watchdog key, to avoid any
649 ;; buggy loops etc. keeping the watchdog alive after this.
653 ;; We need to extend the 3.3ms after the NMI at watchdog bite, so we have
654 ;; time for an oops-dump over a 115k2 serial wire. Another 100ms should do.
656 ;; Change the watchdog key to an arbitrary 3-bit value and restart the
659 moveq IO_FIELD (R_WATCHDOG, key, WD_INIT), $r10
660 move.d R_WATCHDOG, $r11
663 moveq IO_FIELD (R_WATCHDOG, key, \
664 IO_EXTRACT (R_WATCHDOG, key, \
665 IO_MASK (R_WATCHDOG, key)) \
667 | IO_STATE (R_WATCHDOG, enable, start), $r10
672 ;; Note that we don't do "setf m" here (or after two necessary NOPs),
673 ;; since *not* doing that saves us from re-entrancy checks. We don't want
674 ;; to get here again due to possible subsequent NMIs; we want the watchdog
677 move.d _watchdogmsg,$r10
681 jsr watchdog_bite_hook
683 ;; This nop is here so we see the "Watchdog_bite" label in ksymoops dumps
684 ;; rather than "spurious_interrupt".
686 ;; At this point we drop down into spurious_interrupt, which will do a
691 .ascii "Oops: bitten by watchdog\n\0"
694 #endif /* CONFIG_ETRAX_WATCHDOG and not CONFIG_SVINTO_SIM */
700 ;; this handles the case when multiple interrupts arrive at the same time
701 ;; we jump to the first set interrupt bit in a priority fashion
702 ;; the hardware will call the unserved interrupts after the handler finishes
705 ;; this prologue MUST match the one in irq.h and the struct in ptregs.h!!!
706 move $irp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame
713 push $r10 ; push orig_r10
714 clear.d [$sp=$sp-4] ; frametype == 0, normal frame
716 move.d irq_shortcuts + 8, $r1
717 moveq 2, $r2 ; first bit we care about is the timer0 irq
718 move.d [R_VECT_MASK_RD], $r0; read the irq bits that triggered the multiple irq
720 btst $r2, $r0 ; check for the irq given by bit r2
721 bmi _do_shortcut ; actually do the shortcut
723 addq 1, $r2 ; next vector bit
724 addq 4, $r1 ; next vector
726 bne 1b ; process all irq's up to and including number 31
729 ;; strange, we didn't get any set vector bits.. oh well, just return
738 jump [$r1] ; jump to the irq handlers shortcut
742 ;; SIGTRAP the process that executed the break instruction.
743 ;; Make a frame that Rexit in entry.S expects.
745 move $brp, [$sp=$sp-16] ; Push BRP while faking a cpu status record.
746 push $srp ; Push subroutine return pointer.
747 push $dccr ; Push condition codes.
748 push $mof ; Push multiply overflow reg.
749 di ; Need to disable irq's at this point.
750 subq 14*4, $sp ; Make room for r0-r13.
751 movem $r13, [$sp] ; Push the r0-r13 registers.
752 push $r10 ; Push orig_r10.
753 clear.d [$sp=$sp-4] ; Frametype - this is a normal stackframe.
755 movs.w -8192,$r9 ; THREAD_SIZE == 8192
757 move.d [$r9+TI_task], $r10
758 move.d [$r10+TASK_pid], $r10 ; current->pid as arg1.
759 moveq 5, $r11 ; SIGTRAP as arg2.
761 jump ret_from_intr ; Use the return routine for interrupts.
763 gdb_handle_breakpoint:
766 #ifdef CONFIG_ETRAX_KGDB
767 move $dccr, $r0 ; U-flag not affected by previous insns.
768 btstq 8, $r0 ; Test the U-flag.
769 bmi _ugdb_handle_breakpoint ; Go to user mode debugging.
770 nop ; Empty delay slot (cannot pop r0 here).
771 pop $r0 ; Restore r0.
772 ba kgdb_handle_breakpoint ; Go to kernel debugging.
773 pop $dccr ; Restore dccr in delay slot.
776 _ugdb_handle_breakpoint:
777 move $brp, $r0 ; Use r0 temporarily for calculation.
778 subq 2, $r0 ; Set to address of previous instruction.
780 pop $r0 ; Restore r0.
781 ba do_sigtrap ; SIGTRAP the offending process.
782 pop $dccr ; Restore dccr in delay slot.
793 .long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */
798 .long sys_open /* 5 */
803 .long sys_unlink /* 10 */
808 .long sys_chmod /* 15 */
810 .long sys_ni_syscall /* old break syscall holder */
813 .long sys_getpid /* 20 */
818 .long sys_stime /* 25 */
823 .long sys_utime /* 30 */
824 .long sys_ni_syscall /* old stty syscall holder */
825 .long sys_ni_syscall /* old gtty syscall holder */
828 .long sys_ni_syscall /* 35 old ftime syscall holder */
833 .long sys_rmdir /* 40 */
837 .long sys_ni_syscall /* old prof syscall holder */
838 .long sys_brk /* 45 */
843 .long sys_getegid16 /* 50 */
845 .long sys_umount /* recycled never used phys( */
846 .long sys_ni_syscall /* old lock syscall holder */
848 .long sys_fcntl /* 55 */
849 .long sys_ni_syscall /* old mpx syscall holder */
851 .long sys_ni_syscall /* old ulimit syscall holder */
852 .long sys_ni_syscall /* old sys_olduname holder */
853 .long sys_umask /* 60 */
858 .long sys_getpgrp /* 65 */
863 .long sys_setreuid16 /* 70 */
867 .long sys_sethostname
868 .long sys_setrlimit /* 75 */
869 .long sys_old_getrlimit
871 .long sys_gettimeofday
872 .long sys_settimeofday
873 .long sys_getgroups16 /* 80 */
874 .long sys_setgroups16
875 .long sys_select /* was old_select in Linux/E100 */
878 .long sys_readlink /* 85 */
883 .long old_mmap /* 90 */
888 .long sys_fchown16 /* 95 */
889 .long sys_getpriority
890 .long sys_setpriority
891 .long sys_ni_syscall /* old profil syscall holder */
893 .long sys_fstatfs /* 100 */
894 .long sys_ni_syscall /* sys_ioperm in i386 */
898 .long sys_getitimer /* 105 */
902 .long sys_ni_syscall /* old sys_uname holder */
903 .long sys_ni_syscall /* sys_iopl in i386 */
905 .long sys_ni_syscall /* old "idle" system call */
906 .long sys_ni_syscall /* vm86old in i386 */
908 .long sys_swapoff /* 115 */
913 .long sys_clone /* 120 */
914 .long sys_setdomainname
916 .long sys_ni_syscall /* sys_modify_ldt */
918 .long sys_mprotect /* 125 */
919 .long sys_sigprocmask
920 .long sys_ni_syscall /* old "create_module" */
921 .long sys_init_module
922 .long sys_delete_module
923 .long sys_ni_syscall /* 130: old "get_kernel_syms" */
928 .long sys_sysfs /* 135 */
929 .long sys_personality
930 .long sys_ni_syscall /* for afs_syscall */
933 .long sys_llseek /* 140 */
938 .long sys_readv /* 145 */
943 .long sys_mlock /* 150 */
947 .long sys_sched_setparam
948 .long sys_sched_getparam /* 155 */
949 .long sys_sched_setscheduler
950 .long sys_sched_getscheduler
951 .long sys_sched_yield
952 .long sys_sched_get_priority_max
953 .long sys_sched_get_priority_min /* 160 */
954 .long sys_sched_rr_get_interval
957 .long sys_setresuid16
958 .long sys_getresuid16 /* 165 */
959 .long sys_ni_syscall /* sys_vm86 */
960 .long sys_ni_syscall /* Old sys_query_module */
963 .long sys_setresgid16 /* 170 */
964 .long sys_getresgid16
966 .long sys_rt_sigreturn
967 .long sys_rt_sigaction
968 .long sys_rt_sigprocmask /* 175 */
969 .long sys_rt_sigpending
970 .long sys_rt_sigtimedwait
971 .long sys_rt_sigqueueinfo
972 .long sys_rt_sigsuspend
973 .long sys_pread64 /* 180 */
978 .long sys_capset /* 185 */
979 .long sys_sigaltstack
981 .long sys_ni_syscall /* streams1 */
982 .long sys_ni_syscall /* streams2 */
983 .long sys_vfork /* 190 */
987 .long sys_ftruncate64
988 .long sys_stat64 /* 195 */
993 .long sys_getgid /* 200 */
998 .long sys_getgroups /* 205 */
1003 .long sys_setresgid /* 210 */
1008 .long sys_setfsuid /* 215 */
1010 .long sys_pivot_root
1013 .long sys_getdents64 /* 220 */
1015 .long sys_ni_syscall /* reserved for TUX */
1016 .long sys_ni_syscall
1018 .long sys_readahead /* 225 */
1023 .long sys_lgetxattr /* 230 */
1026 .long sys_llistxattr
1027 .long sys_flistxattr
1028 .long sys_removexattr /* 235 */
1029 .long sys_lremovexattr
1030 .long sys_fremovexattr
1032 .long sys_sendfile64
1033 .long sys_futex /* 240 */
1034 .long sys_sched_setaffinity
1035 .long sys_sched_getaffinity
1036 .long sys_ni_syscall /* sys_set_thread_area */
1037 .long sys_ni_syscall /* sys_get_thread_area */
1038 .long sys_io_setup /* 245 */
1039 .long sys_io_destroy
1040 .long sys_io_getevents
1043 .long sys_fadvise64 /* 250 */
1044 .long sys_ni_syscall
1045 .long sys_exit_group
1046 .long sys_lookup_dcookie
1047 .long sys_epoll_create
1048 .long sys_epoll_ctl /* 255 */
1049 .long sys_epoll_wait
1050 .long sys_remap_file_pages
1051 .long sys_set_tid_address
1052 .long sys_timer_create
1053 .long sys_timer_settime /* 260 */
1054 .long sys_timer_gettime
1055 .long sys_timer_getoverrun
1056 .long sys_timer_delete
1057 .long sys_clock_settime
1058 .long sys_clock_gettime /* 265 */
1059 .long sys_clock_getres
1060 .long sys_clock_nanosleep
1065 * NOTE!! This doesn't have to be exact - we just have
1066 * to make sure we have _enough_ of the "sys_ni_syscall"
1067 * entries. Don't panic if you notice that this hasn't
1068 * been shrunk every time we add a new system call.
1071 .rept NR_syscalls-(.-sys_call_table)/4
1072 .long sys_ni_syscall